The event returned on May 22, 2018, running through to June 11, 2018. The event came with new arena map Petra, a Competitive variant of Deathmatch, and new Loot Box drop system: 2018 Anniversary Boxes are also guaranteed to drop one item from another seasonal event, and Legendary Anniversary Boxes will always drop at least one Legendary item; the latter can only be obtained by logging in during the event or bulk purchasing 50 crates.

The event also contains a limited series of items, which could be earned through special Loot Boxes, and unlocked through Hero Gallery. All event-exclusive content became unobtainable once the event ended.